Describe a simple experiment you could do to determine whether sunglasses in a store are polarizing.
a) Shine a light through two pairs of sunglasses and observe for interference patterns.
b) Observe the sunglasses' lenses under polarized light and check for changes in brightness.
c) Measure the sunglasses' index of refraction using a spectrometer.
d) Test the sunglasses' ability to block UV rays using a UV meter.